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Evolution has done its best, but there's a limit to how many plug-and-play neural implants, supercharged blood cells, strong-as-steel bone replacements and mind-controlled PCs you can expect from randomly colliding natural forces. Wanna be Superman? Better call the engineers.
The Modern Guy’s Tools--the basic keyboard, scuba tank, cordless drill--are used pretty much like the old mastodon-femur club or flint scraping knife. You take them in hand and apply some muscle. Then you put them away (or misplace them somewhere in the garage) until the next time.
The concept of a tool is a bit different for Robert Freitas, a researcher who's drawn up plans for an oxygen-carrying nanobot that, injected into the bloodstream, could let a human dive without tanks for hours at a time. And for the University of Chicago engineer who's working out the technology to let someone send an e-mail just by thinking about it. And for the researchers developing nanobots powered by glucose that could clean your arteries for decades without ever needing new batteries. Such devices will disappear inside our bodies, operating on a semipermanent basis and gradually transforming us into, well, superheroes. Skeptical? Imagine what the user of a cellphone or a Cessna--or, heck, the telegraph--would have looked like to the guy who invented the wheel. Even greater changes lie ahead. Ready, wheel-user? Here's a preview of the guy one researcher calls Homo technicus.
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